![]() ![]() Note that you can have more than one switch on each pin where the NC is connected in serial fashion and the NO is connected in parallel fashion (this can be seen on the diagram in the multiple limits switch section). If the origin is in the middle, the negative would be at a little more than the -4 foot end and the positive would be at a bit more than the +4 foot end. The negative end would be the limit switch behind the 0 foot location behind the origin. The positive end would be the limit switch at the end of the machine that, say the machine has a 4'x8' area, reaches a bit after the 8 foot mark. Each axis can have two limit switches: one for the ++ (positive) end and one for the - (negative) end. Sure, the USB interface has a place for 4 axes of limit switches.
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